When to Change Spark Plugs? The 5 Simple Ways

Spark plugs are a necessity for your car. It's what keeps your vehicle going while on the road. Just like a radiator stop leak or learning how to bleed brakes by yourself, you'll need to know when to change spark plugs, so you'll be able to avoid any problems that arise from failed power. But what exactly will you need to know about spark plugs and how to change them?

Don't worry; it's easy! In this article, we'll show you everything you need to know about when to change spark plugs and how important these car parts are to your vehicle.


What Are Spark Plugs?

Spark Plugs

From the name itself, think of it as a tool that helps ignite something through a spark. It's a small part of the car that holds one of the essential functions: To start your vehicle!

A spark plug emits a small spark that starts your car's ignition, which in turn, would allow your car's engine to run and stay running through the mixture of air and fuel. Your spark plugs will also help burn off deposits from fuel additives or more contaminants that may come your car's way.

Without your spark plug, you won't be able to start your vehicle, much less go anywhere at all! If your spark plug begins to fail, then your vehicle won't be able to start properly, or it will start to reduce its fuel economy. And that's something no one wants!

When to Change Spark Plugs

While you can check your spark plugs yourself to see if they need changing, there are other things your car may experience, indicating that you need to replace your spark plugs. The symptoms usually center around the ignition and engine.

Change Spark Plugs

Here are the specific symptoms that will determine when to change spark plugs:

1. Starting Your Car

Your car should never have problems when starting. It should always be smooth and easy. But if you'll need to turn the engine on a few times before it finally begins to run, then that may be a sign of your spark plugs not being able to ignite the spark your engine needs properly.

It may also mean being out of fuel or a flat battery. But if your fuel levels are excellent and your battery is charged, then it's a problem with your spark plugs.

2. Fuel Consumption

Your spark plugs are also directed towards your car's fuel consumption. If your spark plugs begin to deteriorate, then you will notice that your vehicle uses up more fuel than it did before, usually up to 30%!

3. Acceleration

Your car accelerating poorly is the main symptom of broken spark plugs. You'll know when your car can't accelerate properly if it doesn't respond when you put your foot on the gas, or it has a slow reaction when you try to accelerate it. If it feels like your vehicle is pushing harder than it should move forward, then you'll need to change your spark plugs.

4. Engine Surge

If your engine begins to surge (aka sucks more air and jerks then slows down), your engine is hesitating, which is also very dangerous when in traffic. If your engine stalls for a second while running, that's also another sign your spark plugs need changing.

Another engine problem would be if your engine's sound is a bit rough and jittery, as well as vibrating more, then your spark plugs need changing before it leads to expensive repairs to your engine!

5. When It's Recommended

Change Spark Plugs

Usually, spark plugs will need to be replaced after every 100,000 miles. Some can go for less, usually at 30,000 miles. If you have already driven at least 30,000 miles on your car, then it's time to take preventive measures and make sure that your vehicle has new spark plugs before it begins to suffer from any of the symptoms stated above.

It's best to put your spark plugs as part of your car tune up checklist, so your mechanic can determine whether the plugs need changing or not.

In Conclusion

Spark plugs are small but an absolute essential when starting your car. That's why you will need to make sure that your spark plugs are working or when it needs to be replaced. That way, you'll avoid having to hassle yourself with a car that won't start, especially when you are in a hurry!

I hope that this article on spark plugs and when to change spark plugs helps you learn the essentials. Next up, you'll be able to find out more about the rest of your car, like how to add transmission fluid or to invest in other extras for your vehicle, like the best 10-inch subwoofer!

If you want to post your opinions and tips on when to change spark plugs, the comment section is open. We appreciate anything you help you have to offer!

Tom Nguyen

I’m Tom, and I’m avid fan of automobiles! I love cars and learning more about how to tweak and repair them to make them look and perform better. Through a lot of projects and research, I make it a point to share my knowledge to other car enthusiasts like me.

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